This circuit was suggested by Motorola in a 1969 publication. It makes use of components of the time, but both the FET and the bipolar may be general purpose current types.
This circuit can be implemented with discrete transistors. We found it in General Electric's 1964...
Suggested by Siliconix documentation from the 90's, this circuit uses power MOSFETs according to the...
With 3 transistors, this sensitive circuit was found in the July 1990 issue of Radio Electronics...